Tube-cutter.



W. A. & c. M. ALTMAN. 'I

Patented'Sept 6,1910.

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Zma/n/ UNITED STATES PATENT OFFICE.

WILLIAM A. ALTMAN AND CURTISS .'LVI. ALTMAN, 0F FINDLAY, OHIO.

TUBE-CUTTER.

Specification of Letters Patent;

Patented Sept. 6, 1910.

Application led April 30, 1909. Serial No. 493,233.

To all whom 'it may concern:

Be it known that we, VILLIAM A. ALT- MAN and CURTISS M. ALTMAN, citizensof the United States, residing at Findlay, in the county of Hancock andState of Ohio, have invented certain new and useful Improvements inTube-Cutters, of which the following is a specification.

This invent-ion relates to cutters and has particular reference to apipel or boiler tube cutter which is adapted for cutting the ends of thepipes or such tubes.

The invention has for an object a device of this character which is ofnovel construction and in which a positive feed means is employed forfeeding the cutter against the pipe or boiler tube while the cutter isbeing rotated and to thereby insure the even and positive cutting o-fthe section of the pipe or the boiler tube being acted upon.

The invention further contemplates the provision of a device which is ofsimple construction, the same comprising but few operative parts andwhich is adapted to be actuated either by motor or by the hand throughthe employment of a wrench or like tool, and which is provided with afeed nut which is adapted for positive operation in vconnection with thedevice to advance the cutter wheel against. the inner face of the pipe.or tube to be cut.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying drawings, in which;

Figure 1 is a longitudinal section through the device showing atransverse section of the pin supporting the operating lever, and Fig. 2is a transverse section on the line 2 2 of Fig. 1.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingsby the same reference characters.

Referring to the drawings the numeral 10 designates a mandrel which iscylindrical and of elongated formation and provided with a threadedshank 11 at its outer extremity upon which is mounted a feed nut 12. Themandrel 10 is provided in one side with a longitudinal slot or recess13, which extends practically the entire length of the mandrel, forthereception of a lever 14, which is fulcrumed upon a pivot pin 15, thepivot pin 15 being transversely disposed through the mandrel 10intermediately of the ends of the same. The short arm of the lever 14 isprovided with fork arms 16 which are arranged in longitudinal alinementwith the lever 14 between which fork arms a cutter wheel 17 is mountedand adapted for rotation in the plane of the rotation of the mandrel 10when operated to revolve about its longitudinal axis. The outer orelongated arm of the lever 14 is provided with an up-turned extremity 18which extends centrally through the feed nut 12, passes through the slot13, and is engaged against a rounded surface 19 formed upon the outerend of the nut 12, the nut 12 being slidably engaged with the inclinedportion 18 during the rotation of the mandrel 10. The long arm of thelever 14 is provided with a spring 20 which is disposed within themandrel 10 in the outer end of the slot 13 and engages at its oppositeends with the arm 18 and the mandrel 10.

The spring 20 is employed for the purpose of normally holding the longarm of the lever 14 in a raised or outward position against the curvedface 19 to retract the cutter wheel 17 from the pipe 21 which isdisposed thereabout. The feed nut 12 is provided with an outwardlyextended handle 22 to form a hand grasp for the operator to prevent therotation ofthe feed nut 12 dur- Yng the revolving of the mandrel 10 tocause the feed nut 12 to travel outwardly upon the shank 11 by reason ofits threaded engagement with the shank 11 against the arm 18, and tothereby gradually depress the inclined extremity 18. The mandrel 10 isprovided with an angular head 23 which is engaged in any suitable mannerto rotate the mandrel 10, the same being capable of being attached to amotor, a wrench or the like for the purpose of causing such rotation.

For the purpose of quickly and easily positioning the mandrel 10 withinthe end of the pipe or tube 21, the mandrel is provided with anadjustable gage to regulate the distance in the pipe 21 to which thecutter wheel 17 is to extend. This gage comprises a sleeve 24 having adiameter considerably greater than the diameter of the mandrel 10, whichis spaced concentrically about the mandrel 10 and held in such positionby the formation of an inwardly enlarged portion 25 at one end of thesleeve 24 through which set screws 26 are disposed for engagement in anannular gro'ove formed in the outer face of a Collar 27. The collar 27is engaged upon the mandrel 10 for longitudinal movement thereto yet issnugly engaged therewith and is extended into the end of the sleeve 24where it isV engaged with the set screws 26.

The collar 27 is provided at its outer end with an annular flange 28 forengagement against the outer end of the sleeve 24, and also for thereception of set screws 29 which extend inwardly and engage against theouter face of the mandrel 10 to rigidly and adjustably retain the collar27 and sleeve 24 in position.

In the operation of the device the collar 27 is adjusted longitudinallyupon the mandrel 10 to obtain the desired length of the mandrel inwardlyof the Collar 27 when the set screws 29 are tightened and the collar 27,and sleeve 24C carried thereby, are fixed in position. The inner end ofthe mandrel 10 is now engaged within the boiler tube or pipe 21 and thecollar 27 of the gage is abutted against the tube or pipe 21, or isinserted to such a distance that the inner end of the sleeve 24 strikesagainst the boiler tube sheet when the mandrel 10 is adjusted within thesleeve 24 relative to the boiler tube sheet; thereby positioning thecutter wheel 17 in such a manner as to cut the boiler tube the desiredlength eithery inwardly or outwardly of the boiler tube sheeet.

The head 23 is now rotated in any suitable manner to rotate the mandrell0 and shank 11, causing the feed nut 12 to move outwardly upon theshank 11 and to ride over the up-turned end 1S, depressing the long armof the lever 14 to raise the fork arms 16 which carry the cutter wheel17. This action presses the cutter wheel 17 against the inner face ofthe pipe or boiler tube 21 and causes the cutting of the same during therotation of the wheel 17.

Having thus described the invention what is claimed as new is A tubecutter including a cylindrical mandrel having a longitudinal slot in oneside thereof, a feed nut disposed in threaded engagement upon the outerend of said mandrel, a lever pivoted intermediate of its ends in theslot in said mandrel, a cutter wheel carried in one end of said levertransversely to the axis of said mandrel, the opposite end of said leverbeing curved upward and engaged through and against said feed nut, aspring interposed between the upturned end of said lever and the innerface of said mandrel in the slot, a handle on said feed nut to rigidlyhold the saine, and means for rotating said mandrel.

In testimony whereof we affix our signatures in presence of twowitnesses.

VILLIAM A. ALTMAN. [L s] CURTISS M. ALTMAN. [1.. sf] lVitnesses LYMANlV. MARTIN, EDWARD HONEEKER.

